refactor(git): narrow entry_key + show_diff to FileEntry

lua/git/status_win.lua

@@ -447,13 +447,9 @@ local function other_pane(s, entry)
 end
 
 ---@param s ow.Git.StatusState
----@param entry ow.Git.StatusEntry
+---@param entry ow.Git.FileEntry
 ---@return ow.Git.DiffPair?
 local function compute_pair(s, entry)
-    if not entry.path then
-        return nil
-    end
-    ---@cast entry ow.Git.FileEntry
     local other = other_pane(s, entry)
     if not other then
         return nil
@@ -535,20 +531,20 @@ local function adopt_diff_wins(s, sidebar_win)
     return left, right
 end
 
----@param entry ow.Git.StatusEntry
+---@param entry ow.Git.FileEntry
 ---@return string
 local function entry_key(entry)
-    return entry.section
-        .. "|"
-        .. (entry.path or entry.sha or "")
-        .. "|"
-        .. (entry.orig or "")
+    return entry.section .. "|" .. entry.path .. "|" .. (entry.orig or "")
 end
 
 ---@param s ow.Git.StatusState
 ---@param entry ow.Git.StatusEntry
 ---@param focus_left boolean
 local function show_diff(s, entry, focus_left)
+    if not entry.path then
+        return
+    end
+    ---@cast entry ow.Git.FileEntry
     local sidebar_win = find_sidebar()
     if not sidebar_win then
         return